Python random number generation Exercise to master random data generation techniques

This random number generation exercise questions is to help Python developer quickly learn the various techniques of how to generate random numbers and data in Python. This random number generation exercise and challenge helps you to understand the Python random module, secrets module, and its methods.

What is included in this exercise?

• Now it has 10 exercise question.
• The solution is provided at the end of each question.
• Each question contains a specific skill you need to learn.

When you complete each question you get more familiar with random data generation techniques in Python. Practice Questions using Code Editor

Tips and helpful learning resources are provided for each question, which helps you to solve the exercise. I request you to solve all the questions by yourself. After you are done with your solution, you can refer my answer.

Refer to the following tutorials to solve the exercise.

• Generating Random data in Python.
• Secure Random data in Python.

Question 1: Generate 3 random integers between 100 and 999 which is divisible by 5

Reference article for help: 

• Python get a random number within a range

Marks: 5

import random

print("Generating 3 random integer number between 100 and 999 divisible by 5")
for num in range(3):
    print(random.randrange(100, 999, 5), end=', ')

Question 2: Random Lottery Pick

Lottery game –  Generate a 100 Lottery tickets and pick two lucky tickets from it as a winner.

Note you must adhere to the following conditions:

• Lottery number must be 10 digits long.
• All 1000 ticket number must be unique.

Reference article for help: 

• random.randrange()
• random.sample()

Marks: 15

import random

lottery_tickets_list = []
print("creating 100 random lottery tickets")
for i in range(100):
    lottery_tickets_list.append(random.randrange(1000000000, 9999999999))

winners = random.sample(lottery_tickets_list, 2)
print("Lucky 2 lottery tickets are", winners)

Question 3: Generate 6 digit random secure OTP

Reference article for help: 

• Python secrets module to generate secure numbers
• Python get a random number within a range

Marks: 5

import secrets

#Getting systemRandom class instance out of secrets module
secretsGenerator = secrets.SystemRandom()

print("Generating 6 digit random OTP")
otp = secretsGenerator.randrange(100000, 999999)

print("Secure random OTP is ", otp)

Question 4: Pick a random charcter from a given String

Reference article for help: random.choice()

Marks: 5

import random

name = 'pynative'
char = random.choice(name)
print("random char is ", char)

Question 5: Generate  random String of length 5

Note: String must be the combination of the UPPER case and lower case letters only. No numbers and a special symbol.

Reference article for help: Generate random String in Python.

Marks: 10

import random
import string

def randomString(stringLength):
    """Generate a random string of 5 charcters"""
    letters = string.ascii_letters
    return ''.join(random.choice(letters) for i in range(stringLength))

print ("Random String is ", randomString(5) )

Question 6: Generate a random Password which meets the following conditions

• Password length must be 10 characters long.
• It must contain at least 2 upper case letter, 2 digits, and 2 special symbols.

Reference article for help:

• Generate random Password in Python

Marks: 15

Question 7: Calculate mutiplication of two random float numbers

Note:

• First random float number must be between 0.1 and 1
• Second random float number must be between 9.5 and 99.5

Reference article for help:

• Generate a random float number in Python
• Generate a random float number between a float range

Marks: 5

import random

num1  = random.random()
print("First Random float is ", num1)
num2 = random.uniform(9.5, 99.5)
print("Second Random float is ", num1)

num3 = num1 * num2
print("Multiplication is ", num3)

Question 8: Generate random secure token of 64 bytes and random URL

Reference article for help:

• Python secrets module to generate secure token
• Python secrets module to generate secure URL

Marks: 10

import secrets

print("Random secure Hexadecimal token is ", secrets.token_hex(64))
print("Random secure URL is ", secrets.token_urlsafe(64))

Question 9: Roll dice in such a way that every time you get the same number

Dice has 6 number(from 1 to 6). Roll dice in such a way that every time you must get same output number. do this 5 times.

Reference article for help:

• How to seed random number generator
• random.choice()

Marks: 15

import random

dice = [1, 2, 3, 4, 5, 6]
print("Randomly selecting same number of a dice")
for i in range(5):
    random.seed(25)
    print(random.choice(dice))

Question 10: Generate a random date between given start and end dates

Marks: 15

import random
import time

def getRandomDate(startDate, endDate ):
    print("Printing random date between", startDate, " and ", endDate)
    randomGenerator = random.random()
    dateFormat = '%m/%d/%Y'

    startTime = time.mktime(time.strptime(startDate, dateFormat))
    endTime = time.mktime(time.strptime(endDate, dateFormat))

    randomTime = startTime + randomGenerator * (endTime - startTime)
    randomDate = time.strftime(dateFormat, time.localtime(randomTime))
    return randomDate

print ("Random Date = ", getRandomDate("1/1/2016", "12/12/2018"))